Improvement in clamping devices for filing saws



W. P. WENTWORTH. Clamping Device for Filing Saws.

No. 214,071. Patented April 8,1879.

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ILPEI'DIS, PHOfO-LITHOGRLFKER. WASHXNGION, I16.

UNITED STATES PATENT OFFIGE.

WILLIAM P. WENTWORTH, OF SENECA FALLS, NEW YORK.

IMPROVEMENT IN CLAMPING DEVICES FOR FILING SAWS.

Specification forming part of Letters Patent No. 214,071 dated April 8,1879; application filed January 21, 1878.

To all whom it may concern:

Be it known that I, WILLIAM P. WENT- WORTH, of Seneca Falls, in thecounty of Seneca and State of New York, have invented a new and usefulImprovement in a Clamping Device for Filing Saws, of which the following is a specification.

My invention relates to the manner of pivoting the jaws of the clamptogether, also to the device employed to close and open the jaws of theclamp; and, further, to the providing a muffler of the sound produced byfiling the saw.

Figure 1 is a perspective view of my invention. Fig. 2 is a plan view ofthe operating-lever. Fig. 3 is a detached view of one of the aws.

Arepresents the stationary jaw, which forms a part of the frame L,whichframe is provided with suitable means for attachment to a workbench orother suitable support. Upon the outer edges of this frame are formedthe two projections or standards as, between the upper ends of which ispivoted or journaled the lever E, which has the movable jaw B secured toits upper end. The pivots y, upon which the lever E turns, pass throughthe lever at that point where the outer surface is curved and rounded,so as to form as small a bearing-surface as possible. If so desired,this curved surface may be formed on the inside standards, w, or boththe lever and the standards may be curved. The lower end of this leveris kept from any side movement by means of the pins or stops g, and thelever is caused to rock or move back and forth upon its journals orpivots by having its end bear against the lever G, which has the cam Dformed upon it. As this lever is turned upon its pivot F, the end of thelever E is forced either in or out, as may be desired, and thus the jawB is made to open or close at will.

Secured to the lower edge of the jaw B is a cushion of rubber, M, whichis set in a recess formed along the lower edge of the jaw, so as toprotect it, and which rubber forms a cushion, so as to deaden the noiseof the saw while being filed.

The form of the cam D is best shown in Fig. 2, and projecting out overthis cam is a horn or arm, 13, which catches over the outside of thelever and keeps it in contact with the lever 0.

Having thus described my invention, I claim- 1. The lever 0, having thecam D and arm '5, in combination with the lever E and stops g,substantially as set forth.

2. The jaw B, having the cushion M secured to its lower edge,substantially as specified.

WILLIAM P. WENTWORTH.

Witnesses:

U. S. ALGIRE, SAMUEL J ACOBY.

